ffmpeg横版改竖版加模糊

模糊

ffmpeg -i input_test.mp4 -vf "split[a][b];[a]scale=600:900,boxblur=20:5[1];[b]scale=600:ih*600/iw[2];[1][2]overlay=4:(H-h)/2" -c:v libx264 -crf 18 -preset veryfast -aspect 9:16 -f mp4 output_test.mp4 -y
Code language: JavaScript (javascript)

黑边

ffmpeg -i input.mp4 -vf 'scale=-1:720,pad=1280:720:(1280-iw)/2:0:black' -c:v libx264 -crf 21 -preset veryfast -aspect 16:9 -c:a copy -f mp4 output.mp4 -yCode language: JavaScript (javascript)

来源

• https://zhuanlan.zhihu.com/p/357211558
• https://blog.csdn.net/yu540135101/article/details/103025957
• https://blog.csdn.net/qq_20288327/article/details/114652060
• https://blog.csdn.net/qq_20288327/article/details/114652060